Series Introduction Advertisement for the Victor 1800 Series
electronic calculators.

The Victor 1800-series was the first successful seriers of Victor calculators
(The Victor 3900, Victor's first electronic calculator used LSI IC's, but
the IC's proved to be too aggressive for the technology of the time, and the
machine was a vailure) to utilize Large Scale Integration (LSI) integrated
circuits in their design. The previous generations of Victor calculators
utilized small and medium-scale integrated circuits (See the exhibit
on the Victor 14-322
for an example). The LSI IC's in the 1800-series were made for Victor
by Rockwell. The machines all utilized Burroughs' Panaplex display technology, and all had a capacity of fourteen digits. Features varied, from a very basic
four function office calculator, to a full-featured machine with two
accumulating memory registers, and automatic one-key square root. Later
additions were made to the series to include more advanced scientific
machines to the 1800-series.At introduction, the series included
the model 1440 (basic entry-level model); the
1441 (with one accumulating
memory register); the 1442 (with two memories with added functions); the
1541 (same as model 1441 but adding one-key square root); and the
1542 (same as 1442, with square root). Later, the Model 1721 scientific calculator was added to the series.